People who run their own businesses using their own equipment (truck owner operators) should be free to negotiate their own contracts with whomever they choose to work for under whatever terms both parties deem acceptable.
Yeah I don't get it. The drivers own their trucks. This makes finding a new job exceptionally easy and there's no capital expenditure on behalf of the hiring company for new equipment. Moreover, truckers are free to change between shippers as much as they want.
